Changing the positive direction in a reference frame to the opposite direction does not change the sign of which of the following quantities?
a. velocity
b. average velocity
c. speed
d. displacement
c
You might also like to view...
A 1 cm object is placed 20 cm from a lens. The lens forms a real and inverted image of size 1.5 cm. What is the focal length of the lens?
A. 8.0 cm B. 16 cm C. 12 cm D. 20 cm E. 24 cm
A monomer may be repeated many times in the formation of a chainlike molecule called a(n) ______________
Fill in the blank(s) with correct word
Which of the following statements is true of T Tauri stars?
A) They are often surrounded by thick disks of gas and dust. B) They have completely inactive chromospheres. C) They have very weak magnetic dynamos. D) They are post-main-sequence stars.
About 40 J is required to push a crate 4 m across a floor. If the push is in the same direction as the motion of the crate, the force on the crate is about
A) 4 N. B) 10 N. C) 40 N. D) 160 N.